diastrophic dwarfism

characteristics

...bones, the limbs are extremely short; the head tends to be unusually large. Intelligence and life span are normal. Hypochondroplasia resembles achondroplasia except that the head is of normal size. Diastrophic dwarfism is characterized by progressive, crippling skeletal deformities. There is a high risk of death from respiratory failure during early infancy; thereafter the prospect of a normal...